The Scene-Graphic engine is a simple 3D engine based upon OpenGL and SDL libraries. Its main objective is to ease the use of these libraries by hiding their complexity which let the developper focuses on his application. The SDL library is mainly used to manage windowing, user entries (keyboard and mouse), timers, image files, and so on. The OpenGL library is used for 2D/3D rendering. That is, writing the simpliest application using the engine is done with few lines code. The engine is entirely written in C language and has passed its beta release.